Motor-driven exhauster and compressor.



2 SHEETS-SHBET 1A JNVENTUR.

ATTORNEY:

PATENTBD AUG. 9, 1904.

M. D. COMPTON.

APPLICATION FILED SEPT. 4, 1903.

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MOTOR DRIVEN EXHAUSTER AND COMPRESSOR.

NO MODEL.

PATENTED AUG. 9, 1904.

M. D. COMPTON.

MOTOR DRIVEN EXHAUSTER AND COMPRESSOR.

APPLICATION FILED SEP'l'. L, 1903.

2 SHEETS-SHEBT 2.

N0 MODEL.

WITNESS ATTORNEY.

UNITED STATES Patented August 9, 1904.

PATENT OFFICE.

MELVIN D. COMPTON. OF NEWV YORK, N. Y.

SPECIFICATION forming part of Letters Patent No. 766,876, at d Aug 9,1904. Application filed September 4, 1903. Serial No. 171,919. (Nomodel.)

To (ZZZ whom it may concern.-

Be it known that I, MELVIN D. OoMrToN, a citizen of the United States,residing at the city of New York, in the county of New York and State ofNew York, have invented a cer-' tain new and'useful Motor-DrivenExhauster and Compressor, of which the following is a specification.

One object of the present invention is to provide simple, reliable, andeificient means for increasing the pressure of, forexample, gas from themains and feeding the same at substantially uniform pressure for use.

Another object of the invention is to provide for maintainingindependent of the apparatus a supply of gas in the event of stoppage ofthe apparatus, for example, from some external cause; and another objectof the invention is to provide for shutting off the supply of gasthrough the apparatus in the event of failure of the supply of water fordriving the same.

To these and other ends hereinafter set forth the invention, stated ingeneral terms, comprises the improvements to be presently described andfinally claimed.

The nature, characteristic features, and scope of my invention will bemore fully understood from the following descriptiomtaken in connectionwith the accompanying drawings, forming part hereof, and in which-Figure 1 is a view, partly in central section, illustrating apparatusembodying features of the invention. Fig. 2 is a top or plan View of thesame, and Figs. 3 and 4 are diagrammatic views illustrating thecontrolling-valves.

In the drawings, 1 is a water or driving cylinder, and 2 is a driven orworking cylinder. These cylinders are fitted with pistons each connectedwith the piston-rod 3, and they may be mounted along with the otherparts of the apparatus upon a suitable base 4, so as to cause theapparatus to constitute a unit. Each of these cylinders is provided ator near its ends with ports, and there is a four-way valve or itsequivalent for each cylinder. The valve for the water-cylinder isdesignated 5, and the valve for the other cylinder is designated 6.

7 is an inlet and 8 an outlet pipe for water.

'9 is a pipe leading from the valve 5 to the leading from the valve 6 tothe equalizer 14:

to be presently described.

15 is a pipe leading to the left-hand end, and 16 is a pipe leading tothe right-hand end, of the cylinder 2.

The plugs of the valves 5 and 6 are both connected with a crank-arm 17.The pistonrod 3 is provided with an arm 18, which serves to reciprocatethe bar 19, arranged to slide in suitable ways on the bed.

20 and 21 are springs having their ends respectively connected with thebar 19 and with the crank-arm 17.

Disposed in range of the arm 18 are the tails of detents 22 and 23,which latter are pivoted to the base and are provided with fingersadapted to engage the crank-arm 17 and with stops. As shown, thesedetents are equipped with springs which tend to draw them intoengagement with the crank-arm 17 or lacking that into position for beingheld by their stops. 7

The equalizer 14; consists of a receptacle having a flexible elasticwall or diaphragm 2 1, and there may also be provided a spring 25,having one of its ends in engagement with the diaphragm 2 1 and theother of its ends in engagement with an adjusting-screw 26.

27 is a pipe for conveying the gas under pressure for consumption.

28 is a loy-pass provided with a check-valve 29 and adapted to closedownward, as shown in the drawings.

Inuse water is alternately admitted and exhausted from the ends of thecylinder 1, cansing the piston-rod to reciprocate back and forth, sothat gas is taken into the ends of the cylinder 2 and passed therefromto the equalizer 14. Assuming that the parts occupy the position shownin Figs. 1 and 2, the pistonrod is moving toward the left, the spring 20is under tension, and the detent 22 is holding the crank-arm 17. Wateris passing by way of 7 and 9 to the right-hand end of the cylinder 1 andexhaust-Water is passing from the left-hand end of the cylinder 1 by and8. Gas is passing under compression by and 13 to the equalizer and isbeing drawn into the right-hand end of the cylinder 2 by way of 11 and16. The arm 18 contacting with the tail of the detent 22 lifts it,whereupon the spring 20 rapidly throws the bell-crank over until it isengaged by the detent 23, and this is true irrespective of the speed ofthe piston. However, this movement of the crank-arm 17 reverses theposition of the plug-valves and causes a stroke of the pistons towardthe right, and at each stroke there is a repetition of the describedmovements. Obviously the springs 20 and 21 cause the valves to movequickly, which is advantageous, and the arrangement of the ports of thevalve 6 causes the gas under compression to have communication only withthe equalizer and not with the meter. Furthermore, if the water-supplyshould be interrupted there is no communication for gas through any partof the cylinder 2 between the pipe 11 and the equalizer 14:. This isobviously advantageous. Under such'circumstances or any others causingstoppage of the apparatus the pressure in the equalizer will of coursefall off, and the pressure in the mains will cause the check-valve 29 toopen, thus affordinga supply of gas by way of the by-pass 28, it beingunderstood that the pressure in the equalizer when the apparatus isrunning is suflicient to keep the check-valve E29 seated.

It will be obvious to those skilled in the art to which my inventionappertains that modifications may be made in detail without departingfrom the spirit thereof. Hence I do not limit myself to the preciseconstruction and arrangement of parts hereinabove set forth andillustrated in the accompanying drawings; but, 7

Having thus described the nature and objects of my invention, whatIclaim as new, and desire to secure by Letters Patent, is

1. The combination of cylinders and their pistons and their motive-fluidconnections, with valve devices for controlling the cylinder outlets andinlets for the fluid acted upon, and means operated by the pistons forinstantly actuating and positively holding each and all of said valvedevices, substantially as described.

2. The combination of cylinders and their pistons and their motive-fluidconnections, with valve devices for controlling the cylinder outlets andinlets for the fluid acted upon, and means operated by the pistons forinstantly actuating and positively and simultaneously holding each andall of said valve devices irrespective of the speed of the piston,substantially as described.

3. The combination of cylinders and their pistons, a four-way plug-valveand its fluid connections for controlling the actuating fluid, afour-way plug-valve and its connections for controlling the cylinderoutlets and inlets for the fluid acted upon, a crank-arm for operatingthe plugs of the valves for positively positioning the plug-valves tocontrol all the valve outlets and inlets, springs having one of theirends connected with the crank-arm and the other of their ends operatedby the pistons, detents for holding the plugs, and a projectionconnected with the pistons for releasing the detents, substantially asdescribed.

4. The combination of cylinders and their pistons, a four-way plug-valveand its fluid connections for controlling the actuating fluid, afour-way plug-valve and its connections for controlling the cylinderoutlets and inlets for the fluid acted upon, a crank-arm for operatingthe plugs of the valves, a reciprocating bar operated by the pistons,springs having their ends attached to the crank-arm and to the bar,detents for holding the plug-valves, and a projection operated from thepistons and adapted to trip the detents, substantially as described.

In testimony whereof I have hereunto signed my name.

MELVIN D. COMPTON. In presence of K. M. GILLIGAN, WV. J. JACKSON.

